“To the choirmaster. Of David, the servant of the Lord. Transgression speaks to the wicked deep in his heart; there is no fear of God before his eyes.” -Psalm 36:title–1
The only other Psalm that uses the expression, “the servant of the Lord” in the title is Psalm 18. In that Psalm, David speaks of being delivered from King Saul who sought for his life.
The opening of this Psalm is startling. In the Hebrew it reads, literally, “An Oracle of Transgression.” One probable way of translating this into our vernacular would be,
“An oracle: Transgression, as related to the wicked, is in the midst of his heart.”
In other words, this is a Psalm that recounts what God has revealed about the frightful condition of an evil man’s heart. He does not fear God at all. He feels not culpability for his sins. It may be that he is like the fool Solomon warns us about: “The fool says in his heart, “There is no God.” They are corrupt, they do abominable deeds; there is none who does good.” -Psalm 14:1 cf. 53:1
But it’s more likely he just doesn’t believe that God cares or that God will do anything about it. His heart is like that of the antediluvians: “The Lord saw that the wickedness of man was great in the earth, and that every intention of the thoughts of his heart was only evil continually.” -Genesis 6:5